In a bowl, combine olives, chili powder, cumin, and salt; set aside 2 T of this mixture. Add the mayonnaise, sour cream, and green onions to the remaining olive mixture.

Place bread on an ungreased baking sheet and spread 1 T of the mayonnaise mixture on each slice or roll. Top with slices of turkey and tomatoes. Spread with another tablespoon of the mayonnaise mixture. Top with sliced avocados and cheeses. Sprinkle with the reserved 2 tablespoons of olive mixture

Bake at 350 for 15 minutes or until heated through. Makes 8-10 servings.